Vafek [1]} has recently shown that the specific heat of undoped graphene sheets presents an anomalous low-temperature behavior showing a logarithmic suppression with respect to its noninteracting counterpart, \(C_V(T \rightarrow 0)/C_V(0)\propto T/\ln (T)\) . On the other hand, in Refs. [2]}, [3]} we have demonstrated (see also Ref. [4]}) that doped graphene sheets are normal (pseudochiral) Fermi liquids, with Landau parameters that possess, however, a quite distinct behavior from those of conventional 2D EGs. In this work we calculate the Helmholtz free energy \({\cal F}(T)\)  of doped graphene sheets within the Random Phase Approximation (RPA) [5]}, [6]}. This allows us to access important thermodynamic quantities,
such as the compressibility and the specific heat, which can be calculated by taking appropriate derivatives of the free energy. We show that, at low temperatures, the specific heat of doped graphene, contrary to the one of the undoped system [1]}, has the usual linear-in-temperature behavior, which
is solely controlled by the renormalized velocity of quasiparticles as in a normal Fermi liquid.
